noun

inflection

A turn away from a straight or uniform course.

A slight inflection in her voice makes the statement sound doubtful.

Etymology

The Latin root means to bend. Inflection names the resulting turn or change of course, whether in a line, surface, or other developing pattern.

More examples

A gentle inflection in the roofline breaks its otherwise straight profile.
The trail follows the natural inflections of the hillside.
His questioning inflection turns a simple greeting into an invitation to talk.

inflection · inflections

inflect verb — To vary the pitch or tone.

bend: Usually describes a physical curve rather than vocal variation.
turn: More broadly describes a change in direction or course.
modulation: Specifically emphasizes controlled variation in sound, especially vocal tone.